Stage 1 for the VZ-VE Holden Commodore involves reprogramming the factory ECU with HP Tuners VCM Edit Suite software.
The VT to VZ Commodore 6 Cy engine can be tuned using the Haltech Interceptor. Both offer control over the engine timing and fuel maps that will allow gains in performance and fuel economy across the rev range. Expected gains are between 15 to 25 kW depending on vehicle model.

The Stage 2 Kit for the VT to VE Holden Commodore include the following components:

HP Tuners VCM Edit Suit ECU Retune or Haltech Interceptor
XForce 2.5 inch Stainless Exhaust System